Combined condenser and resistance unit



Nov. 10, 1931. E. B. NOWOSIELSKE 3 M COMBINED CONDENSER AND RESISTANCE UNIT Filed March 8 1924 IN VE N TOR EDI WED E/VOWUS/EL S'K/ BY M2. S ff ATTOR/VE Pat Nov. 10, 1931 ,UNITED STATES PATENT OFFICE EDWARD B. NOWOSIELSKI, OF BLOOMFIELD, NEW JERSEY, ASSIGNOR TQ SPLI'IDORF ELECTRICAL COMPANY, OF NEWARK, NEW JERSEY commune CONDENSER AND RESISTANCE nm'r Application filed March 8,

This invention relates to a combination condenser and resistance unit which is particularly adapted for use in connection with radio circuits. In certain of these radio circuits a condenser shunted by resistance is used in connection with the grid circuit, the resistance being commonly referred to as a grid leak.

In order to simplify the wiring of a radio set of this character, I have combined the two pieces of apparatus into one unitary structure, which in the drawings attached to this specification, is shown in Figure 1, the view being taken at somewhat of an angle in order to show clearly the arrangement of the combination structure.

Figure 2 is an end view of the-combined device; while Figure 3 is a bottom view.

In the different views, like numbers refer to corresponding parts. 1 represents a body of a condenser built up in the wellknown manner using alternative layers of tinfoil and a suitable dielectric, such as paperor mica, the edges of the foil extending beyond the sides and bein bent over, the pile being held together by fat binding plate members of suitable insulating material engaged by the clamping members 2 and 3, which also make contact with the opposite conducting elements, as described in Van Deventer Patent 1,181,623. The clamping members have a number of cli s 4 punched outwardly from the metal. (l ditain of these clips, such as shown in-Fi 1 enter holes or recesses 5 in the outside binding members and are bent over so as to prevent the clamping members 2 and 3 from being pulled oil the condensed pile and out of contact with the conducting elements. It is to be understood that the clips which are bent downward into the holes or recesses 5 are preferably shorter than the thickness of the binding members so that there is no danger of these particular clips engaging the metallic foils on the outer layers of the condenser stack. The clips 4 on the bottom side of the clamping member 2 and 3 are used to gri auxiliary terminals 6 and 7, which are pre erably made of spring. or resilient material and are provided with hoies 1924. Serial No. 697,724.

through which two sets of the clips 4 pass, theseclips being bent over as indicated at 8. I preferto throw these clips downward on both ends of the clamping members 2 and 3, as indicated in Fig. 3 in order that the same clamp may be used for both sides of the condenser. Members 2 and 3 are provided with clamping lugs 9, each having a hole 10 therein for mounting the condenser unit. As will be seen from Fig. l, the lugs 9 arepunched outwardly from the body of the clamping members. The terminals 6 and 7 are bent at an angle as clearly shown in the drawings and pass upward along the sides of the condenser to a little distance above the surface or top portion of the condenser. Each of these clips is provided with an orifice 11 and between the clips is adapted to be positioned a resistance unit usually made up of resistance inside a glass tube 12 having metal terminals 13 thereon. The terminals 13 are'adapted to enter the orifices 11 thereby holding the resistance unit securely in position between the auxiliary terminals 7 and 8.

A very important feature of my invention is the connector projections 14: which extend outwardly from the lugs 9. These projec tions it may have small holes in them for the reception of wires if necessary, although I have found that wires may be soldered directly to the projections let without these projections being formed in any special manner or provided with any orifice. The object of these projections is so that in soldering the connectin wires thereto, the'heat will be dissipated efore it is conducted through the clam ing members to the conductor elements 0 the condenser. It will be understood that the capacity of radio condensers of this kind is very low, many or them being built of only two conductor sheets with a dielectric therebetween. These conductor sheets are very thin and any amount of heat would either melt or injure them to such an extent as to render the condenser defective, but by reducing .the amount of metal to be heated and placing this metal at a considerable distance from the conductor elements, I have effected a decided improvement in the construction of such condensers.

It will be understood that my invention is susce tible to reasonable modifications without eparting from the spirit of the same v and the sec e of the appended claim.

Having t us described my invention, what I claim is:

In a device of the class described, a condenser having clampin members on opposite sides thereof and in electrical engagement with the opposite conductin condenser elements thereby forming terminals, said clamping members havin integral cli s for engaging a part of the b0 y of the con enser to hold the clamping members in operative osition and, also having integral mounting ugs and connector projections extending outwardly from saidlugs, said projections being so small that they will become heated sufliciently to perform a soldering operation I long before the lugs reach such soldering temperature.

In testimony whereof, I aflix my signature.

' EDWARD B. NOWOSIELSKL 

